/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.runtime.concurrent;

import javax.annotation.Nonnull;

import java.util.concurrent.ScheduledExecutorService;

/**
 * Adapter class for a {@link ScheduledExecutorService} which shall be used as a
 * {@link ComponentMainThreadExecutor}. It enhances the given executor with an assert that the current thread is the
 * main thread of the executor.
 */
public class ComponentMainThreadExecutorServiceAdapter
	extends ScheduledExecutorServiceAdapter implements ComponentMainThreadExecutor {

	/** A runnable that should assert that the current thread is the expected main thread. */
	@Nonnull
	private final Runnable mainThreadCheck;

	public ComponentMainThreadExecutorServiceAdapter(
		@Nonnull ScheduledExecutorService scheduledExecutorService,
		@Nonnull Runnable mainThreadCheck) {
		super(scheduledExecutorService);
		this.mainThreadCheck = mainThreadCheck;
	}

	@Override
	public void assertRunningInMainThread() {
		mainThreadCheck.run();
	}
}
